Damn, I still havent totally soaked in this whole Doom3 thing. There is a bit of reaction going on around the web though of course. You can have a look at the lengthy reaction from Zoid (Formerly of id Software). Steve Fukuda of 2015 (who recently announced they have licensed the Quake3 engine) has an ominous "All dynasties eventually fall" update. also Hypothermia has 'bring back Steed' poll going. Mike Wilson of Gathering has a cute "is it done yet?" .plan update. Stomped is planning a bit more reactions collection too. Here is a bit from Zoid:

...But there are some issues--when DOOM came out, people were new to the first person shooter genre and one of the reasons DOOM was such a fun game was as you learned how to play you started being able to kill monsters better. These days I (and most experienced players) can run rings around a Cyberdemon and toy with him. DOOM taught me how to strafe, dammit. :)

Which brings up an excellent point. The same formula that made DooM such a hit will just not work again, the market has changed dramatically. I do however feel that the 'technology shock' that went along with DooM may resurface with Carmack's next-generation engine. Oh yeah, and there is a new poll on the right side over there.